Door.



Patented June 20, 1916.

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INVE/VTUR BY 7 v ATTORNEY lllfllllllflllffr4!!!VIIIIIIIIIIfill/4755f!!!IIIIfI/I/ s al/ l/ C. K. OLBERG.

DOOR.

APPLICATION FILED AUG. 19, I914. 1,187,545.

C. K. ()LBERG.

DOOR.

APPLICATION FILED AUG-19.1914.

Patented June 20, 1916.

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ATTORNEY I THE COLUMBIA FLANOCRAPH 60. WASHINGTQN, D. c.

"entrain s rarns rarnnr @Fhffifi.

CHARLES K. OLBERGi, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HALE ANDKILBURN COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OFDELAWARE.

DOOR.

Specification of Letters Patent. P t t d Jung 2a, 191

Application filed August 19,1914. Serial No. 857,581.

To all whom it may concern:

Be it known that I, CHARLES K. OLBERG, a subject of the King of Norway,and a resident of Philadelphia, in the county of Philadelphia and Stateof Pennsylvania, have invented certain ne Y and useful Improvements inDoors, of which the following is a specification.

My invention relates to improvements in doors and my object is toprovide a door of fireproof character in which certain disadvantages offireproof doors as commonly made are obviated. I

Briefly, my invention comprises a composite door having a fireproof corecovered with wood on both sides. In my preferred construction, the coreis formed of asbestos or other fireproof material of poor heatconductivity, which core is held between two steel. or other fireproofplates which are covered with wood, the steel plates and wood beingreinforced around the edges of the door by a continuous metallicreinforcing frame. When such a door is mounted in a metallic door-casingto which it is hung by steel hinges and the lock casing is attached tothe central metallic portion of the door, in the manner contemplated byme, it is obvious that a complete fire wall is thereby established pastwhich a fire on one side of the door cannot pass or be communicated tothe chamber on the other side of the door.

Fireproof doors are commonly manufac tured of hollow metal, and thisconstruction has several features which have been found objectionable..One of the chief of these is that the hollow metallic doors areconstantly being dented, as for example, by baggage carried through suchdoors when installed in hotels and the like. When such doors-are dented,the finish is scarred and an 1H]UI V given to the appearance of the doorwhich is difficult and expensive to repair. The metallic sound given outwhen hollow metal doors are struck is also objectionable. These defectsare overcome by my construction and furthermore it should be noted thatmy construction makes it possible to manufacture a fireproof doorinwvhicl the most elaborate design may be secured at low cost, whereassuch designs, in the case of hollow metallic doors, are both difficultand expensive to manufacture.

Other objects of my invention reside in the construction of parts andcombinations of structural elements as will appear more fully in thefollowing specification.

In order that my invention may be more clearly understood, attention ishereby di-.

'rected to the accompanying drawings forming part of my invention andillustrating certain embodiments thereof.

In the drawings, Figure 1 represents a side elevation of a door made inaccordance with my invention, Fig. 2 represents a vertical section on anenlarged scale, taken on line 22 of Fig. 1, Fig. 3'represents a similarsection of a modified form of construction, Fig. 4 represents a similarsection of adoor in which the panels are of a different construction,Fig. 5 represents an enlarged detail longitudinal section through anedge portion of the door showing the lock casing in elevation, Fig. 6 isa similar view on a section taken a little to one side of that of Fig.5, Figs. 7 and 8 are respectively vertical and horizontal sections takenon the lines '77 and 88 of Fig. 6, and Fig. 9 is a partial detailsectional view showing the mounting of one of the hinges for the door.

leferring to the drawings, the door 1 may be formed with a core 2 ofasbestos or other fireproof material of poor heat conductivity, heldbetween parallel fireproof plates, pref erably steel, 3 and 4. In theform of my invention illustrated in Fig. 2, the steel plates 3 and I arereinforced by a continuous frame 5 formed of a steel T section eX-tending all the way around the door, the central web of the T memberbeing inserted between the steel plates and the flanges of the T sectionprovidinga metallic edge for the door at the top, bottom'and sides. Woodis secured upon both sides of the fireproof core to form a completedoor, the preferable construction comprising inner layers of wood 6 and7 and outer layers 8 and 9, on the two sides of the door. The innerwooden memtion 5 provide a, metallic face for the full.

width of the edge of the door on all four sides thereof, the ends of theflanges of the T section preferably being tapered as shown in Fig. 2.The door is preferably mounted in a steel jamb 10 of a metallic doorcasing to which the door may be secured by means spects advantageous isillustrated 111 F1g.

of steel hinges, which are attached to the T frame. 5. The lock of thedoor shown'in Figs. 5 to S has a face-plate attached to the T frame 5,the casing for the lock being inclosed in a metallic box-likeconstruction,

, which I may term a patch pocket,attached to the st'eel plates 3 and 4,preferably by welding. lVith such a construction, it is obvious that acomplete fire Wall is provided and while a fire on'on'e side of theclosed doormi ht slowly partly consume the wood .Fig. 1.

covering on that side of the door, it could not pass the central core ofthe door, and the passage of flame and in a large measure the passage ofsmoke through the narrow space between the metallic edge member 5 of thedoor and the metallic jamb 10 would be prevented.

Referring to Figs. 5 to 8, the lock is preferably mounted in thefollowing manner. The edge member 5 and plates 3 and 41 are cut away asillustrated at a point adjacent one edge of the door midway between thetwo panels in the construction illustrated in The edge member 5 hereillustrated is of the, T shape shown in Fig. 2. A reinforcing member 23is made in one piece of a T cross-section, the same as member 5, and isbent to rectangular shape, the web 2 1 of this member being cut out ateach corner to simplify the bending. thesame width as the base portionof the T frame 5 are welded to therear side of the base portion of Tframe 5. The web portion 5 of T frame 5 is cut back somewhat farther.than the flanges of the same, as shown in Fig. 5, and bars 25' arepositioned in the openings. thus made and extend inwardly beyond thepoints at which the flanges of member 5 were cut away as shown. The webportions 24 of member 23 are, welded to the adjacent edges of webs 5.ofmember 5, the web and flanges of member 23 alsobeing welded to'bars25. The face i plate 26 ofthe lock isscrewed, as shown at 27, to bars25, th lock casing 28 being carried by face plate 26. A pair of metalplates 29, 29,; are bent around'member 23 Flat bars 25, 25 of forced ateach hinge cut-out by a flat bar 30 of the same width as the bottomflange member 5. Bar 30 is preferably electrically welded to member 5 ateach end of the cutout, the w'ebportion 5 of member 5 being cut back toaccommodate member 30. The

I hinge leaf 31 is attached to bar 30 by screws 32 as shown. 7

A construction which I deem 111 some reconstituting plates secured tothe outer sur- 7 faces of plates 3v and 4 adjacent all four edges of thedoor. At the edges of plates ,3 and e, member5 is bent at right anglesto form flanges 13 and 1-1 and is bent again to form a bottom flange. 15parallel to flanges 13 and 14, 'flange15 constituting the edge surfaceof the door. This construction has the advantage that the asbestos orother fireproof core of the door inclosed within plates 3' and 41 may becarried all the way to flanges 15 on all the edges of the door, theasbestos being a very poor con-' ductor of heat and because'of thisconstructiondecreasing the possibility of fire on one side of the doorbeing communicated to the other. The inner wooden'members 6 and 7 inthis construction are secured to the outer surfaces of plates 3 and 4,and outer members 8 and 9 secured to the outer surfaces of members 6 and7, as in the form already described, and a surface of veneer .16 may besecured upon the outer surfaces of wooden .members 8 and 9, the veneersurfaces at their edges coveringthe bent ends of the flanges of member5', the veneer similarly, in the construction of Fig. 2, if used,covering the ends of the flanges of member 5.

The advantage of forming the wooden Coverings of the door in inner andouter layers 6, 7 and 8, 9, is that theouter layers .8 and 9 with theveneer 16 first glued thereto may be mitered and cut to size beforebeing finally glued onto theinner layersfi and 7. This constructioneliminates the difh-,

culty experienced in making perfect mitered or butt joints in the thinlayer of veneer when the latteris not first attached to a heaviermember, and the difliculty of veneering the piecesafter being allassembled.

In this construction the moldings 19 and 20 are shown as separatemembers which are glued onto the inner and outer wood layers as shown. I

It should be understood that, while I consider the above describedconstruction of wooden coverings as preferable, my invention is notlimited thereto, it being possible, of course, to secure the outercoverings 8 and 9 directly to the plates 3 and 4, the moldings l9 and 20being either integral with members 8 and 9 or separate pieces, and innermembers 6 and 7, if used to cover the door panels, extending only ashort distance beyond the panels, between members 8 and 9 and plates 3and 4, respectively.

In Fig. 4 is shown a construction similar to that illustrated in Fig. 2,differing only in that the panels of the doors are not provided with anywooden covering, the metallic plates 3 and 4 constituting the surfacesof the panels, and inner wooden members 6 and 7 terminating, preferablyin a bevel, within moldings 19 and 20. As is obvious my invention mayalso be carried into effect in a form of door in which no panels areprovided.

As stated in the preferred form of my invention, the fireproof core ofthe door consists of asbestos interposed betw en steel or otherfireproof plates 3 and 4-, my invention, however, not being limitedstrictly to this construction but embodying broadly adoor or other panelhaving a fireproof core of any suitable nature with wooden surfacessecured thereon. In my preferred construction, the asbestos board isinterposed between steel or other fireproof plates 3 and i, steel spuds17 being interposed between plates 3 and4 and welded to the same to holdthe plates and the interposed asbestos in place and to insure properalinement of the plates. In the construction shown in Fig. 2, plates 3and l are preferably welded to the web of member 5. The wooden members 6and 7 may be secured to plates 3 and -t in any suitable manner.Preferably they are secured thereto by means of metallic spuds, such as18, extending through the wooden members and welded at their inner endsto the respective metallic plates. Or, bolts may be used, as shown at 21in Fig. 3, extending through wooden members 6 and 7 and through theplates and asbestos of the.

core. The outer ends of the metallic spuds or bolts may be provided withenlarged heads, and if the bolts are used, nuts 22 may be prO- vided,the ends of which spud or bolt heads, and nuts, if used, lie flush with,or below, the outer surface of the wooden members 6 and 7 securedthereby, the ends of the spuds or bolts being covered by the outerlayers 8 and 9. The method of securing wooden coverings 6 and 7 to theplates-3 and 4-, if metallic plates are used, by the spuds weldment inwelding. It is to be understood that while the method of securing thewooden coverings described forms a convenient means of attaching thesame, my invention is not limited to the use of such devices.

Having now described my invention, what I claim as new therein anddesire to secure by Letters Patent is as follows 1. In a door, thecombination of a core, plates of fireproof material on both sides ofsaid core, secured together through said core, wooden stiles and crossrails secured to said plates, and a reinforcing member of fireproofmaterial extending along all the edges of the door having an inwardlyextending portion, secured to the edges of both said plates, and havinga marginal portion providing fireproof edge surfaces around said door,substantially as set forth.

2. In a door, the combination of a pair of fireproof plates securedtogether in parallel relation, fire-resisting, non-heat conductingmaterial between said plates, throughout substantially the height andbreadth of the door, wooden coverings secured to said plates, and a.fireproof reinforcing member having flanges secured to the outer sidesof an edge of said plates, and a flange at right angles to said flanges,constituting an edge surface for said door, substantially as set forth.

3. In a door, the combination of a pair of metal plates secured togetherin parallel relation, fire-resisting non-heat-conducting materialbetween said plates, throughout substantially the dimensions of thedoor, wooden coverings secured to the outer sides of said plates, ametallic edge member extending around the door, having a flangeconstituting the edge surface thereof, and having a portion at rightangles to said flange, and concealed means for securing said platestogether in spaced relation and holding the interposed material inplace, said plates and said right angular portion of said edgememberbeing secured together, substantially as set forth.

l. In a door, the combination of a pair of metal plates secured togetherin parallel relation, fire-resisting, non-heat-conducting materialbetween said plates, throughout substantially the dimensions of thedoor, wooden coverings secured to the outer sides of said plates, ametallic edge member ex tending around the door, having a flangeconstituting the edge surface thereof, and having a. portion at rightangles to said flange, metal hinges securedto said edge member and alock casing secured to a metallic element of the door, substantially asset forth.

' together, fire-resisting material of poor heat .conductivlty betweensaid plates, ooden coverings secured to the outer sides of said plates,a metallic edge member extendmg around the door, constituting the edgesurface thereof, and secured to one of said plates, and Wooden stile andcross rail mem bers, secured tosaid ooden coverings, and extendingOVGI'SiLld. edge member, substantially as set forth.

This specification signed and witnessec' this 15th day of August, 1914.

CHARLES K. OLBERG.

VVitnessesi D. J. OCONNOR, Jr., TM. J. EARNSHAW.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatenta.

. Washington, 13.0."

